<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>第一个three.js文件_WebGL三维场景</title>
  <style>
    body {
      margin: 0;
      overflow: hidden;
      /* 隐藏body窗口区域滚动条 */
    }
  </style>
  <!--引入three.js三维引擎-->
  <script src="js/three.js"></script>
  <script src="js/OrbitControls.js"></script>
  <!-- <script src="./three.js"></script> -->
  <!-- <script src="http://www.yanhuangxueyuan.com/threejs/build/three.js"></script> -->
</head>

<body>
  <div id = "thshowdiv" class="thshowdiv">

  </div>
  <script>
    /**
     * 创建场景对象Scene
     */
    var scene = new THREE.Scene();
    var showdiv = document.getElementById("thshowdiv");
    /**
     * 创建网格模型
     */
    // var geometry = new THREE.SphereGeometry(40, 100, 100); //创建一个球体几何对象
    var geometry = new THREE.BoxGeometry(100, 100, 100); //创建一个立方体几何对象Geometry
    var material = new THREE.MeshPhongMaterial({
      color: 0x0000ff,
      specular:0x4488ee,
      shininess:12
    }); //材质对象Material
    var mesh = new THREE.Mesh(geometry, material); //网格模型对象Mesh
    scene.add(mesh); //网格模型添加到场景中

    /**
     * 创建柱体网格模型
     **/
    var geometry2 = new THREE.CylinderGeometry(50,50,100,25);
    var material2 = new THREE.MeshLambertMaterial({
      color:0x525436,
      opacity:0.6,
      transparent:true,
      wireframe:true,
    });
    var mesh2 = new THREE.Mesh(geometry2,material2);
    mesh2.position.set(120,0,0);
    scene.add(mesh2);
    /**
     * 辅助三维坐标系
     **/
    var axisHelper = new THREE.AxesHelper(250);
    scene.add(axisHelper);
    /**
     * 光源设置
     */
    //点光源
    var point = new THREE.PointLight(0xffffff);
    point.position.set(400, 200, 300); //点光源位置
    scene.add(point); //点光源添加到场景中
    //环境光
    var ambient = new THREE.AmbientLight(0x444444);
    scene.add(ambient);
    // console.log(scene)
    // console.log(scene.children)
    /**
     * 相机设置
     */
    var width = window.innerWidth; //窗口宽度
    var height = window.innerHeight; //窗口高度
    var k = width / height; //窗口宽高比
    var s = 200; //三维场景显示范围控制系数，系数越大，显示的范围越大
    //创建相机对象
    var camera = new THREE.PerspectiveCamera( 45, width / height, 1, 1000 );
    camera.position.set(200, 300, 200); //设置相机位置
    camera.lookAt(scene.position); //设置相机方向(指向的场景对象)
    /**
     * 创建渲染器对象
     */
    var renderer = new THREE.WebGLRenderer();
    renderer.setSize(width, height);//设置渲染区域尺寸
    renderer.setClearColor(0xb9d3ff, 1); //设置背景颜色
    document.body.appendChild(renderer.domElement); //body元素中插入canvas对象
    //执行渲染操作   指定场景、相机作为参数
    // let t1 = new Date();
// 渲染函数
// function render() {
//     let t2 = new Date();
//     let t = t2-t1;
//     t1 = t2;
//     requestAnimationFrame(render)
//     renderer.render(scene,camera);//执行渲染操作
//     mesh.rotateY(0.001*t);//每次绕y轴旋转0.01弧度
//     mesh.rotateX(0.002*t);

// }
// render();
function render() {
    renderer.render(scene,camera);//执行渲染操作
    requestAnimationFrame(render);
}
render();
var orbitControls = new THREE.OrbitControls(camera,renderer.domElement);   //创建控件对象
//orbitControls.addEventListener("change",render);   //监听鼠标键盘的事件
//间隔20ms周期性调用函数fun,20ms也就是刷新频率是50FPS(1s/20ms)，每秒渲染50次
//setInterval("render()",20);
  </script>
</body>
</html>